This is a super powerful .45-70 +P (Magnum) loading. It is externally identical to SAAMI spec .45-70 ammo, but internally it generates far more power and pressure. While it will fit and chamber into any .45-70 firearm, its use should be limited to firearms built to handle the +P pressures it produces.
Approved firearms for this load include:
- All Marlin 1895 iterations made since 1972 (built on Model 336 actions)
- All Browning 1885 and 1886 copies
- Rossi Rio Grande
- New England Arms Handi Rifle
- T/C Encore
- All falling block actions made of modern steel (e.g., Ruger #1 and #3)
- Shiloh, Christian, and Pedersoli Sharps
- Henry Lever Action Rifles
- All Winchester 1886 iterations made since 1915
- CVA Centerfire Rifles
- All Siamese Mauser bolt actions
This load features an all-copper expanding 350 gr. TSX-FN long-for-weight bullet. It penetrates about as deeply as a premium 400+ gr. lead-core partition expanding bullet, while offering the benefits of a lighter projectile—reduced recoil and flatter trajectory.
Due to the bullet’s length, powder capacity in the .45-70 casing is limited, preventing higher velocities. However, velocities exceeding 1,900 fps are still extremely powerful. For those who prefer the Barnes TSX-FN bullet, this trade-off is worthwhile. Additionally, the reduced velocity results in significantly lower felt recoil.
As always, Buffalo Bore uses real-world firearms to generate published velocities. We reject the industry-wide practice of using extra-long laboratory barrels to advertise velocities that customers cannot replicate in the field.
- 1,931 fps – Marlin 1895, 22-inch barrel
- 1,914 fps – Marlin 1895, 18-inch barrel
Many shooters don’t realize that the .45-70 requires very little barrel length to achieve maximum velocity. As shown above, any straight-walled case (unlike bottleneck cases such as the .30-06) using relatively fast-burning rifle powders will reach full velocity in shorter barrels.
